<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
<HEAD><TITLE>Tk_MainWindow manual page - Tk Library Procedures</TITLE>
<link rel="stylesheet" href="../docs.css" type="text/css" media="all">
</HEAD>
<BODY><H2><a href="../contents.htm">Tcl8.6.11/Tk8.6.11 Documentation</a> <small>&gt;</small> <a href="contents.htm">Tk C API</a> <small>&gt;</small> MainWin</H2>
<H3><A HREF="../UserCmd/contents.htm">Tcl/Tk Applications</A> | <A HREF="../TclCmd/contents.htm">Tcl Commands</A> | <A HREF="../TkCmd/contents.htm">Tk Commands</A> | <A HREF="../ItclCmd/contents.htm">[incr Tcl] Package Commands</A> | <A HREF="../SqliteCmd/contents.htm">SQLite3 Package Commands</A> | <A HREF="../TdbcCmd/contents.htm">TDBC Package Commands</A> | <A HREF="../TdbcmysqlCmd/contents.htm">tdbc::mysql Package Commands</A> | <A HREF="../TdbcodbcCmd/contents.htm">tdbc::odbc Package Commands</A> | <A HREF="../TdbcpostgresCmd/contents.htm">tdbc::postgres Package Commands</A> | <A HREF="../TdbcsqliteCmd/contents.htm">tdbc::sqlite3 Package Commands</A> | <A HREF="../ThreadCmd/contents.htm">Thread Package Commands</A> | <A HREF="../TclLib/contents.htm">Tcl C API</A> | <A HREF="../TkLib/contents.htm">Tk C API</A> | <A HREF="../ItclLib/contents.htm">[incr Tcl] Package C API</A> | <A HREF="../TdbcLib/contents.htm">TDBC Package C API</A></H3>
<H3><A NAME="M2">NAME</A></H3>
Tk_MainWindow, Tk_GetNumMainWindows &mdash; functions for querying main window information
<H3><A NAME="M3">SYNOPSIS</A></H3>
<B>#include &lt;tk.h&gt;</B><BR>
<A HREF="../TkLib/WindowId.htm">Tk_Window</A><BR>
<B>Tk_MainWindow</B>(<I>interp</I>)<BR>
int<BR>
<B>Tk_GetNumMainWindows</B>()<BR>
<H3><A NAME="M4">ARGUMENTS</A></H3>
<DL class="arguments">
<DT><A HREF="../TclLib/Interp.htm">Tcl_Interp</A> <B>*interp</B> (in/out)<DD>
Interpreter associated with the application.
<P></DL>
<H3><A NAME="M5">DESCRIPTION</A></H3>
A main window is a special kind of toplevel window used as the
outermost window in an application.
<P>
If <I>interp</I> is associated with a Tk application then <B>Tk_MainWindow</B>
returns the application's main window. If there is no Tk application
associated with <I>interp</I> then <B>Tk_MainWindow</B> returns NULL and
leaves an error message in interpreter <I>interp</I>'s result.
<P>
<B>Tk_GetNumMainWindows</B> returns a count of the number of main
windows currently open in the current thread.
<H3><A NAME="M6">KEYWORDS</A></H3>
<A href="../Keywords/A.htm#application">application</A>, <A href="../Keywords/M.htm#main window">main window</A>
<div class="copy">Copyright &copy; 1990 The Regents of the University of California.
<BR>Copyright &copy; 1994-1996 Sun Microsystems, Inc.
</div>
</BODY></HTML>
